首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   30446篇
  免费   1519篇
  国内免费   5篇
各国政治   1296篇
工人农民   1367篇
世界政治   2090篇
外交国际关系   1025篇
法律   20076篇
中国共产党   8篇
中国政治   230篇
政治理论   5625篇
综合类   253篇
  2021年   157篇
  2020年   565篇
  2019年   623篇
  2018年   795篇
  2017年   870篇
  2016年   944篇
  2015年   700篇
  2014年   755篇
  2013年   3042篇
  2012年   828篇
  2011年   882篇
  2010年   807篇
  2009年   853篇
  2008年   898篇
  2007年   929篇
  2006年   922篇
  2005年   821篇
  2004年   801篇
  2003年   767篇
  2002年   745篇
  2001年   1157篇
  2000年   1015篇
  1999年   835篇
  1998年   443篇
  1997年   317篇
  1996年   365篇
  1995年   336篇
  1994年   339篇
  1993年   341篇
  1992年   550篇
  1991年   589篇
  1990年   566篇
  1989年   506篇
  1988年   558篇
  1987年   490篇
  1986年   577篇
  1985年   542篇
  1984年   428篇
  1983年   405篇
  1982年   332篇
  1981年   316篇
  1980年   249篇
  1979年   358篇
  1978年   221篇
  1977年   180篇
  1976年   163篇
  1975年   208篇
  1974年   233篇
  1973年   175篇
  1972年   170篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
901.
902.
903.
904.
This article analyses the Portuguese presidential elections of January 2016, setting these within the backdrop of recent semi-presidential practice in Portugal. The election took place in the context of an apparent hollowing of the presidency, a pattern that potentially reflects the bailout that marked most of the second term of the outgoing president, Cavaco Silva. This pattern also helps explain the second-order nature of this presidential election. Despite potentially being an ‘open’ election – in that the incumbent had reached term limits – the election was characterised by low citizen mobilisation, low partisan involvement and low competitiveness. The initial two months of the newly elected president, Marcelo Rebelo de Sousa, suggests he is seeking to invert this hollowing pattern by mobilising popular support behind the presidency.  相似文献   
905.
The Journal of Technology Transfer - This paper investigates the role of innovative activity and other micro determinants, on firms’ investment behaviour. The empirical analysis is based on a...  相似文献   
906.
Journal of Family Violence - We qualitatively explored young women’s intimate partner violence (IPV) victimization within abusive first relationships (characterized by physical IPV, coercive...  相似文献   
907.
Social Justice Research - Acting on one’s moral principles is not always easy. Upholding one’s moral beliefs may run counter to one’s social environment or situational demands. It...  相似文献   
908.
The Journal of Technology Transfer - The importance and the definition of an entrepreneurial university (EU), together with the factors that lead to its existence, have been widely discussed in the...  相似文献   
909.
Responsibility for the social safety net continues to “devolve” from the federal to state governments, and many states are now confronting the dilemmas inherent in redesigning welfare—dilemmas that faced Congress, too, as it sought to impose new conditions on receipt of public assistance. This article argues that reforming AFDC is difficult because the public has conflicting goals: putting welfare recipients to work; protecting their children from severe poverty; and controlling costs. For 25 years, reformers have viewed requiring welfare recipients to participate in work-promoting programs as uniquely able to balance these goals. Numerous studies have shown that this approach modestly increased employment and reduced welfare costs. More substantial gains have been achieved by some “mixed-strategy” programs, which stress immediate job entry for some recipients and employment-directed education or training for others. Many people remain on the rolls, however, prompting some policymakers to argue for substituting work-for-benefits or community service work (“workfare”) for welfare after a certain period of time, and others for ending all support. The limited knowledge about work-for-benefits programs suggests that, in contrast to work-promoting activities, this approach ultimately costs money. The research record confirms that there are no easy answers in welfare reform, and that states will have to weigh the trade-offs in considering alternative strategies.  相似文献   
910.
Schools across the country are ending the practice of grouping students based on ability, in part, because of research indicating that tracking hurts low-ability students without helping students of other ability levels. Using a nationally representative survey conducted by the National Center for Education Statistics, (NCES) we reexamine the impact of tracking on high school student achievement through the estimation of a standard education production function. This approach allows us to control for the possibility that track is correlated with factors such as class size and teacher education. In addition, we address the possibility that there are unobserved student or school characteristics that affect both achievement and track placement. Our results indicate that abolishing tracking in America's schools would have a large positive impact on achievement for students currently in the lower tracks, but that this increase in achievement would come at the expense of students in upper-track classes.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号